The tire pressure sensors placed on the valve stems of the tires send a wireless signal to the display monitor mounted in the cab every 5 minutes, however, it transmits immediately if there is any abnormal condition happened; Drivers don't need to stare at the display during driving; It will give audible and visible alert if something wrong with the tireThe pressure range of the sensor is 0-188PSI, with an expected battery life of 2 years; And it's only 18 grams and it will not affect the tire balance; Users can simply replace the battery in the sensor when the display indicate low battery icon on the monitor